Answer:
x=9
Explanation:
1. simplify the left side of the equation 7x +3x-18 becomes 10x-18
2. simplify the right side of the equation 6(x+3) becomes 6x+18
3 so the equation now is 10x-18=6x+18
4 subtract 6x from both sides to get 4x-18=18
5. add 18 to both sides to get 4x=36
6 finally divide both sides equally by 4 to solve for x so x=36÷4=9
x=9